US20240043090A1 - Gear shift device and associated mobility machine - Google Patents
Gear shift device and associated mobility machine Download PDFInfo
- Publication number
- US20240043090A1 US20240043090A1 US18/254,470 US202118254470A US2024043090A1 US 20240043090 A1 US20240043090 A1 US 20240043090A1 US 202118254470 A US202118254470 A US 202118254470A US 2024043090 A1 US2024043090 A1 US 2024043090A1
- Authority
- US
- United States
- Prior art keywords
- gear
- gear shift
- shift device
- shuttle
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007935 neutral effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000001131 transforming effect Effects 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003387 muscular Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
- B62M25/08—Actuators for gearing speed-change mechanisms specially adapted for cycles with electrical or fluid transmitting systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
- B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
- B62M11/06—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with spur gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/55—Rider propelled cycles with auxiliary electric motor power-driven at crank shafts parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
- F16H3/089—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/04—Combinations of toothed gearings only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/08—Multiple final output mechanisms being moved by a single common final actuating mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/08—Multiple final output mechanisms being moved by a single common final actuating mechanism
- F16H63/16—Multiple final output mechanisms being moved by a single common final actuating mechanism the final output mechanisms being successively actuated by progressive movement of the final actuating mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/304—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H2063/3093—Final output elements, i.e. the final elements to establish gear ratio, e.g. dog clutches or other means establishing coupling to shaft
- F16H2063/3096—Sliding keys as final output elements; Details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/083—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with radially acting and axially controlled clutching members, e.g. sliding keys
Definitions
- the field of the present invention is that of what is referred to as “soft” mobility, and more particularly that of mobility machines that combine electrical propulsion and muscular force, for example electrically assisted bicycles.
- Gearboxes for cycles are known from the prior art.
- the publication FR2975367 A1 discloses a gear shift device for bicycles that has a gearbox and a sliding shuttle for selecting the gear.
- the axial displacement of the shuttle is controlled via two cables connected to a rotary handle positioned on the bicycle handlebar.
- This system requires many parts. It is complex to manufacture and maintain. In particular, the cable control requires precise and regular adjustment. There is a need to simplify and automate gearboxes for cycles.
- the subject of the invention is a gear shift device for a mobility machine
- Each of the gears has a particular ratio between the output speed and the input speed of the gear shift device.
- the number of positions of the shuttle is at least equal to the number of gears of the gear shift device.
- Each gear corresponds to a particular position of the shuttle in which the input pinion of the selected gear meshes with the corresponding output pinion.
- the hollow shaft turns, which drives the shuttle.
- the worm screw is rotated by the gear shift actuator.
- the rotational movement of the worm screw is transformed into a translational movement of the shuttle, which is displaced into the position corresponding to the selected gear.
- the hollow shaft is a selection shaft, the two expressions being used equivalently in the present application.
- the invention also provides a compact gear shift device with reduced bulk.
- the worm screw driven by the gear shift actuator does away with the cables of the prior art and thus affords a more reliable solution which is easy to maintain.
- the gear shift actuator has mechanical means for bringing about a translational movement of the shuttle, in particular means for transforming a rotational movement into a translational movement.
- the gear shift actuator also has electric means for moving the shuttle, in particular a reduction gearset.
- the gear shift device according to the invention has one or another of the following features, taken alone or in combination:
- the shift device has a rail along which the shuttle is displaced.
- the rail is housed in particular in the selection shaft.
- the shuttle may have over its entire length at least one axial channel in which the rail is positioned. The channel, or one of the channels, thus serves to retain the rail.
- the shuttle is connected to the rail via a nut.
- the rail constitutes a linear abutment that prevents the rotation of the nut.
- the axial movement of the nut drives the shuttle and thus changes the gear.
- the nut is accommodated inside the shuttle.
- the rail and the nut are thus part of the mechanical means for bringing about a translational movement of the shuttle. They form a pivot connection between the worm screw and the shuttle, transforming the rotational movement of the worm screw into the translational movement of the shuttle.
- the gear shift device has at least one epicyclic gear train.
- the latter replaces the rail and the nut of the preceding embodiment.
- the epicyclic gear train is part of the mechanical means for bringing about a translational movement of the shuttle.
- the epicyclic gear train is a double epicyclic reduction gear having an inner ring that is integral with the selection shaft and an outer ring that is integral with the worm. The two rings, inner and outer, are linked via at least three satellite pinions.
- the reduction gearset In order to perform a gear shift, the reduction gearset temporarily turns the outer ring through a determined angle which depends on the necessary displacement of the shuttle between the positions that respectively correspond to the initial gear and to the desired gear. Following the angular deflection thus created between the inner ring and the outer ring, the ratio between the rotation of each ring is temporarily no longer equal to one. The shuttle is thus driven in a translational movement until it reaches a new position corresponding to the new gear that is selected.
- the invention relates to a transmission assembly for a mobility machine, said transmission assembly having an electric motor, in particular arranged so as to supply all or some of the energy for propelling the machine, and a gear shift device as described above.
- the invention relates to a mobility machine having a gear shift device, as described above.
- the machine may have a rechargeable energy source, in particular a battery, for supplying power to the reduction gearset device.
- Said battery is preferably arranged so as to supply energy to the various members of the mobility machine, in particular the lighting, an optional locating/navigation system, etc., this list being non-limiting.
- the mobility machine is electrically assisted and has an electric motor, provided for example with a reduction gear.
- the mobility machine is in particular arranged such that the electric motor can supply the torque when the instantaneous speed of the mobility machine is less than a threshold value.
- the mobility machine is not electrically assisted.
- the invention relates to a method for controlling a gear shift device, as described above.
- the method has a step of triggering a selected gear of the gear shift device.
- a control unit controls the gear shift actuator on the basis of an order on the part of the user indicating the chosen gear.
- FIG. 1 is a view of a mobility machine according to one of the aspects of the invention.
- FIG. 2 illustrates the transmission assembly of the mobility machine of FIG. 1
- FIG. 3 a , FIG. 3 b and FIG. 3 c show various sectional views of a gear shift device according to a first embodiment of the invention
- FIG. 4 illustrates a casing that accommodates a gear shift device according to the invention
- FIG. 5 and FIG. 6 illustrate a gear shift device according to a second embodiment of the invention in section
- FIG. 7 a to FIG. 7 g schematically show different variants of a gear shift actuator according to the first embodiment of the invention.
- FIG. 8 a to FIG. 8 g schematically show different variants of a gear shift actuator according to the second embodiment of the invention.
- FIG. 1 illustrates a mobility machine 900 according to one of the aspects of the invention.
- the machine 900 is an electrically assisted bicycle having an electric motor 300 with an axis of rotation X m .
- Said electric motor is arranged so as to provide some of the propulsion of said machine.
- the motive force is supplied by the cyclist and is transmitted to the wheels 950 via two pedals turning about an axis Xp of a crankset that drives the rear wheel via a chain.
- the machine 900 has a control unit 800 and multiple sensors 80 , located in particular at the crankset, on the bicycle frame or at a wheel.
- the machine 900 also has an energy storage device in the form of a battery 910 , a lighting system 920 , a crankset 940 with an axis Xp, a locating and/or navigation system 980 , and a human/machine interface system 990 having in particular a touch screen that can display information for and/or take into account the requests of said user.
- the human/machine interface system 990 is in particular connected to the locating system 980 and acts as a navigation interface.
- the invention is not limited to a particular human/machine interface system, and may have any system that is known to a person skilled in the art.
- the wheels 950 are provided with a braking system 960 , having in particular disk brakes 965 .
- the machine 900 has a transmission assembly 700 , illustrated in FIG. 2 .
- the transmission assembly 700 has a gear shift device 100 according to the invention and an electric motor 300 with an axis of rotation Xm for supplying some of the power for propelling the machine 900 .
- the transmission assembly 700 is at least partially accommodated in a casing 600 (illustrated in FIG. 4 ), positioned here at the crankset 940 , the axis of which coincides with the output axis X 3 of the gear shift device 100 .
- the gear shift is automatic and electric.
- the gear shift device 100 illustrated in FIGS. 3 a et seq. has a plurality of 7 gears between a first gear referred to as gear No. 1 and a top gear referred to as gear 7 .
- the device is compact, the selection shaft 200 is hollow.
- the gear shift device 150 includes electric means for moving the shuttle, in the form of a reduction gearset.
- This reduction gearset has a motor 140 and a reduction gear 130 .
- the gear shift actuator 150 also has mechanical means for bringing about a translational movement of the shuttle 155 , in particular means for transforming a rotational movement into a translational movement.
- the reduction gearset assembly has a pinion 135 on the axis of the worm screw 132 , an intermediate pinion 135 and a pinion 135 on the axis Xm of the motor 140 .
- the teeth of the pinion 135 may be straight, as illustrated, or helical, in a variant which is not illustrated.
- the gears are shifted by a sliding shuttle 155 underneath the free pinions 30 of the gearbox.
- the gear shift actuator 150 axially displaces the shuttle along a worm screw 132 via a helical kinematic connection.
- the shuttle 155 therefore stops underneath the input pinion Fr, that corresponds to the selected gear i.
- a spring/ball system as described in the French patent application FR2975367 A1 (illustrated here in more detail in FIG. 5 ) prevents the rotation of said input pinion Fri. Once it is triggered, the input pinion Fri meshes with and transmits forces to the output pinion Fi, and thus to the chain sprocket linked to the bicycle wheel.
- FIG. 3 a illustrates in particular a needle bushing on the side of the pinions 135 of the reduction gear 130 and a ball bearing at the other end of the worm screw 132 .
- FIGS. 3 b and 3 c show detail views of the gear shift device of FIG. 3 a.
- the shuttle 155 is illustrated in FIG. 3 a in the position P 7 corresponding to a gear No. 7, here the top gear, and engages the input pinion Fr 7 such that it meshes with the output pinion F 7
- the shuttle 155 in FIG. 3 b the shuttle 155 is in the position P 1 corresponding to a gear No. 1 and engages the input pinion Fr 1 by virtue of a ball/spring device.
- the shuttle houses a return member 152 that cooperates with a ball 151 of the selection shaft 200 .
- the shuttle 155 is moreover connected to a rail 134 by a nut 138 .
- the shuttle 155 surrounding the nut 138 can turn by virtue of the bearing 136 , retained by a clip 137 here.
- the worm screw 132 is rotated by the gear shift actuator 150 .
- the worm screw 132 is rotated by the gear shift actuator 150 , this causing the axial movement of the nut 138 which drives the shuttle 155 and thus changes the gear.
- the pivot connection thus implemented transforms the rotational movement of the worm screw 132 into the translational movement of the shuttle 155 .
- a stop 133 limits the displacement of the shuttle 155 at each end.
- the stops 133 are for example hollow, as illustrated, and accommodate bearings 136 that serve to support and guide the worm screw 132 .
- the shuttle 155 may adopt a position referred to as the neutral position P 0 in which no gear ratio is engaged.
- the gear shift actuator 150 has straight pinions.
- the reduction gearset may have helical pinions.
- FIG. 4 illustrates the casing 600 for the mobility machine 900 of FIG. 1 in more detail.
- the casing 600 has a crankcase 660 that delimits a first housing 610 arranged so as to accommodate the gearings of the gear shift device 100 .
- the crankcase 660 also delimits multiple second housings that are separate from one another.
- the housings 640 , 630 , 615 and 680 are arranged so as to accommodate the electric motor 400 , the reduction gear 300 , the gear shift actuator 150 and the control unit 800 of the mobility machine, respectively.
- the second housings are preferably sealed, in particular that one which is arranged so as to contain the control unit 800 .
- the crankcase 660 accommodating the gear shift device 100 is closed by two lateral flanges 667 .
- the casing 600 is illustrated empty and with just one flange 667 in FIG. 4 in order to make the various first and second housings more visible.
- the first housing 610 has two facing holes in the lateral flanges 667 for receiving the axle of crankset spindle of the mobility machine 900 .
- FIGS. 5 and 6 relate to the second embodiment.
- the gear shift device 100 has an epicyclic gear train 130 ′ having an inner ring 30 int that is integral with the selection shaft 200 and an outer ring 30 ext that is integral with the worm screw 132 .
- the inner ring 30 int and the outer ring 30 ext are linked by three satellite pinions 135 .
- the worm screw 132 , the selection shaft 200 and the shuttle 155 turn at the same speed.
- the reduction gearset 140 temporarily turns the outer ring through a determined angle that depends on the necessary displacement of the shuttle 155 between the positions that respectively correspond to the initial gear and to the desired gear. Following the angular deflection thus created between the inner ring 30 int and the outer ring 30 ext, the ratio between the rotation of each ring is temporarily no longer equal to one.
- the shuttle 155 is thus driven in a translational movement until it reaches a new position corresponding to the new gear that is selected.
- the first embodiment with a rail and nut is not limited to one type of reduction gearset having pinions with parallel axes, as illustrated in FIG. 3 a .
- the axes of the pinions of the reduction gearset may be perpendicular.
- FIG. 7 a corresponds to an example in which the reduction gearset 130 is limited to a single pinion.
- FIG. 7 b illustrates a variant in which the gear shift actuator 150 has a conical gearing 130 b .
- FIG. 7 c illustrates a variant in which the gear shift actuator 150 has a straight-cut or helical gearing 130 c with one or more stages.
- FIG. 7 d illustrates a variant in which the gear shift actuator 150 has a continuously variable straight-cut or helical gearing 130 d .
- FIG. 7 e illustrates a worm screw 130 e of a variant of the gear shift actuator 150 .
- FIGS. 7 f and 7 g show variants having a gear shift actuator 150 with a belt 130 f and a chain 130 g , respectively.
- FIGS. 8 a to 8 g schematically show different variants of a gear shift actuator according to the second embodiment of the invention.
- FIG. 8 a corresponds to the example illustrated in FIG. 5 a with the epicyclic gear train 130 ′.
- FIG. 8 b illustrates a variant in which the gear shift actuator 150 b has an epicyclic gear train 130 ′ and a conical gearing.
- FIG. 8 c illustrates a variant in which the gear shift actuator 150 c has an epicyclic gear train 130 ′ and a straight-cut or helical gearing with one or more stages.
- FIG. 8 d illustrates a variant in which the gear shift actuator 150 d has an epicyclic gear train 130 ′ and a continuously variable straight-cut or helical gearing.
- FIG. 8 e illustrates a variant in which the gear shift actuator 150 e has an epicyclic gear train 130 ′ and a worm.
- FIGS. 8 f and 8 g show variants having a gear shift actuator 150 f with an epicyclic gear train 130 ′ and a belt, and a gear shift actuator 150 g with an epicyclic gear train 130 ′ and a chain, respectively.
Abstract
A gear shift device for a mobility machine has a plurality of gears between a first gear referred to as gear No. 1 and a top gear. The gear shift device includes a series of input pinions arranged so as to turn freely around a selection shaft with an axis X2, said selection shaft accommodating a worm screw and a shuttle. The gear shift device also includes a series of output pinions with an axis X3 that rotate conjointly with a hollow shaft a gear shift actuator arranged so as to displace the shuttle along the worm screw between a plurality of positions and to engage a selected gear. A mobility machine can include the gear shift device.
Description
- The field of the present invention is that of what is referred to as “soft” mobility, and more particularly that of mobility machines that combine electrical propulsion and muscular force, for example electrically assisted bicycles.
- When cycling, the motive force is supplied by the cyclist and is transmitted to the wheels via a crank system turning about an axis of a crankset that drives the rear wheel, generally via a chain.
- Gearboxes for cycles are known from the prior art. In particular, the publication FR2975367 A1 discloses a gear shift device for bicycles that has a gearbox and a sliding shuttle for selecting the gear. The axial displacement of the shuttle is controlled via two cables connected to a rotary handle positioned on the bicycle handlebar. This system requires many parts. It is complex to manufacture and maintain. In particular, the cable control requires precise and regular adjustment. There is a need to simplify and automate gearboxes for cycles.
- As the field of light-duty crankset-powered vehicles for transporting goods or people diversifies, there is also a need for automatic and electric gearboxes.
- In order to at least partly meet these needs, the subject of the invention, according to a first aspect, is a gear shift device for a mobility machine
-
- said device having a plurality of k gears between a first gear, referred to as gear No. 1, and a top gear, referred to as gear k
- said gear shift device having
- a series of k input pinions arranged so as to turn freely around a selection shaft, said selection shaft accommodating a worm screw and a shuttle
- a series of k output pinions that rotate conjointly with a hollow shaft, said hollow shaft being arranged in particular so as to surround an axis of the crankset of the mobility machine,
- a gear shift actuator for displacing the shuttle along the worm screw between a plurality of k positions corresponding in particular to the gears No. 1 to the top gear and engaging a selected gear.
- Each of the gears has a particular ratio between the output speed and the input speed of the gear shift device.
- The number of positions of the shuttle is at least equal to the number of gears of the gear shift device.
- Each gear corresponds to a particular position of the shuttle in which the input pinion of the selected gear meshes with the corresponding output pinion.
- As soon as the user pedals, the hollow shaft turns, which drives the shuttle. By virtue of the invention, in the event of a gear shift, the worm screw is rotated by the gear shift actuator. The rotational movement of the worm screw is transformed into a translational movement of the shuttle, which is displaced into the position corresponding to the selected gear.
- Here, the hollow shaft is a selection shaft, the two expressions being used equivalently in the present application.
- The invention also provides a compact gear shift device with reduced bulk.
- The worm screw driven by the gear shift actuator does away with the cables of the prior art and thus affords a more reliable solution which is easy to maintain.
- The gear shift actuator has mechanical means for bringing about a translational movement of the shuttle, in particular means for transforming a rotational movement into a translational movement. The gear shift actuator also has electric means for moving the shuttle, in particular a reduction gearset. Advantageously, the gear shift device according to the invention has one or another of the following features, taken alone or in combination:
-
- the shuttle is arranged so as, in each position corresponding to a gear, to engage an associated input pinion such that it meshes with the output pinion associated with said gear.
- so as, in each position corresponding to a gear, to engage an input pinion such that it meshes with an output pinion, the input pinion and output pinion being associated with said gear.
- the shuttle accommodating at least one return member, in particular arranged so as to cooperate with at least one ball of the selection shaft. By virtue of this ball/spring device, the shuttle can engage an input pinion such that it meshes with the associated output pinion. The shuttle may accommodate 1 or more return members, for example between one and six return members. For each gear ratio, the one or more return members cooperate with one or more balls of the selection shaft, for example between one and six balls. For a given gear ratio, the number of balls of the selection shaft is in particular less than or equal to the number of return members of the shuttle.
- the shuttle surrounds the worm.
- the gear shift device has between 2 and 12 gears, or even between 5 and 9 gears.
- the gear shift device has a pivot connection.
- the gear shift actuator has a motor and a reduction gear and/or an epicyclic gear train. The reduction gear has in particular a plurality of pinions positioned between the motor and the worm. In the present application, the term “reduction gearset” is used to designate the motor, the reduction gear and/or the epicyclic gear train, depending on the embodiments.
- the gear shift actuator is arranged so as to displace the shuttle between the predefined positions following a gear selection request from a rider of the mobility machine and/or from a control unit of the mobility machine.
- the shuttle may adopt a position referred to as the neutral position in which no gear ratio is engaged. In other words, the shuttle is in a position in which it is not engaged with any input pinion/the input pinion/output pinion pairs do not mesh. In particular, when the shuttle is in the neutral position, expressed differently the gear shift device is in a neutral gear, the movement of the crankset does not propel the bicycle
- the shuttle may adopt a reverse-movement position which, when it is triggered, propels the mobility machine in a reverse movement whilst pedalling still occurs going forwards.
- According to a first embodiment, the shift device has a rail along which the shuttle is displaced. The rail is housed in particular in the selection shaft. The shuttle may have over its entire length at least one axial channel in which the rail is positioned. The channel, or one of the channels, thus serves to retain the rail.
- When the gear ratio is not being shifted, the worm screw does not turn.
- In the event of a gear-ratio shift, the worm screw is rotated by the gear shift actuator.
- In particular, the shuttle is connected to the rail via a nut. The rail constitutes a linear abutment that prevents the rotation of the nut. The axial movement of the nut drives the shuttle and thus changes the gear.
- In particular, the nut is accommodated inside the shuttle.
- The rail and the nut are thus part of the mechanical means for bringing about a translational movement of the shuttle. They form a pivot connection between the worm screw and the shuttle, transforming the rotational movement of the worm screw into the translational movement of the shuttle.
- According to a second embodiment, the gear shift device has at least one epicyclic gear train. The latter replaces the rail and the nut of the preceding embodiment. Here, the epicyclic gear train is part of the mechanical means for bringing about a translational movement of the shuttle. In particular, the epicyclic gear train is a double epicyclic reduction gear having an inner ring that is integral with the selection shaft and an outer ring that is integral with the worm. The two rings, inner and outer, are linked via at least three satellite pinions.
- In the steady state of rolling, a gear is triggered, the shuttle is located in the position corresponding to said gear, this allowing the corresponding input and output pinions to mesh. The worm, the selection shaft and the shuttle turn at the same speed.
- In order to perform a gear shift, the reduction gearset temporarily turns the outer ring through a determined angle which depends on the necessary displacement of the shuttle between the positions that respectively correspond to the initial gear and to the desired gear. Following the angular deflection thus created between the inner ring and the outer ring, the ratio between the rotation of each ring is temporarily no longer equal to one. The shuttle is thus driven in a translational movement until it reaches a new position corresponding to the new gear that is selected.
- According to another of its aspects, the invention relates to a transmission assembly for a mobility machine, said transmission assembly having an electric motor, in particular arranged so as to supply all or some of the energy for propelling the machine, and a gear shift device as described above.
- According to yet another of its aspects, the invention relates to a mobility machine having a gear shift device, as described above.
- The machine may have a rechargeable energy source, in particular a battery, for supplying power to the reduction gearset device. Said battery is preferably arranged so as to supply energy to the various members of the mobility machine, in particular the lighting, an optional locating/navigation system, etc., this list being non-limiting.
- In one particular embodiment, the mobility machine is electrically assisted and has an electric motor, provided for example with a reduction gear. The mobility machine is in particular arranged such that the electric motor can supply the torque when the instantaneous speed of the mobility machine is less than a threshold value.
- In another embodiment, the mobility machine is not electrically assisted.
- According to yet another of its aspects, the invention relates to a method for controlling a gear shift device, as described above.
- In particular, the method has a step of triggering a selected gear of the gear shift device. During this step, a control unit controls the gear shift actuator on the basis of an order on the part of the user indicating the chosen gear.
- Other features, details and advantages of the invention will become more clearly apparent upon reading the description given below by way of indication, with reference to the drawings, in which:
-
FIG. 1 is a view of a mobility machine according to one of the aspects of the invention, -
FIG. 2 illustrates the transmission assembly of the mobility machine ofFIG. 1 , -
FIG. 3 a ,FIG. 3 b andFIG. 3 c show various sectional views of a gear shift device according to a first embodiment of the invention, -
FIG. 4 illustrates a casing that accommodates a gear shift device according to the invention,FIG. 5 andFIG. 6 illustrate a gear shift device according to a second embodiment of the invention in section, -
FIG. 7 a toFIG. 7 g schematically show different variants of a gear shift actuator according to the first embodiment of the invention, and -
FIG. 8 a toFIG. 8 g schematically show different variants of a gear shift actuator according to the second embodiment of the invention. -
FIG. 1 illustrates amobility machine 900 according to one of the aspects of the invention. Here, themachine 900 is an electrically assisted bicycle having anelectric motor 300 with an axis of rotation Xm. Said electric motor is arranged so as to provide some of the propulsion of said machine. - When travelling without electrical assistance, the motive force is supplied by the cyclist and is transmitted to the
wheels 950 via two pedals turning about an axis Xp of a crankset that drives the rear wheel via a chain. - As shown in
FIG. 1 , themachine 900 has a control unit 800 andmultiple sensors 80, located in particular at the crankset, on the bicycle frame or at a wheel. - Here, the
machine 900 also has an energy storage device in the form of abattery 910, alighting system 920, acrankset 940 with an axis Xp, a locating and/or navigation system 980, and a human/machine interface system 990 having in particular a touch screen that can display information for and/or take into account the requests of said user. The human/machine interface system 990 is in particular connected to the locating system 980 and acts as a navigation interface. The invention is not limited to a particular human/machine interface system, and may have any system that is known to a person skilled in the art. - The
wheels 950 are provided with abraking system 960, having inparticular disk brakes 965. - The
machine 900 has atransmission assembly 700, illustrated inFIG. 2 . Thetransmission assembly 700 has agear shift device 100 according to the invention and anelectric motor 300 with an axis of rotation Xm for supplying some of the power for propelling themachine 900. - The
transmission assembly 700 is at least partially accommodated in a casing 600 (illustrated inFIG. 4 ), positioned here at thecrankset 940, the axis of which coincides with the output axis X3 of thegear shift device 100. - The gear shift is automatic and electric.
- The
gear shift device 100 illustrated inFIGS. 3 a et seq. has a plurality of 7 gears between a first gear referred to as gear No. 1 and a top gear referred to as gear 7. - It has a series of 7
output pinions 30 with an axis X3, of reference F1 to F7, that rotate conjointly with a hollow shaft, and a series of 7 input pinions 20, of reference Fr1 to Fr7, that are arranged so as to turn freely around aselection shaft 200. The latter accommodates ashuttle 155 surrounding aworm screw 132 of thegear shift device 100. Agear shift actuator 150 is arranged so as to displace theshuttle 155 along theworm screw 132 between 7 positions from P1 to P7 and to engage a selected gear. - The device is compact, the
selection shaft 200 is hollow. - The
gear shift device 150 includes electric means for moving the shuttle, in the form of a reduction gearset. This reduction gearset has amotor 140 and areduction gear 130. Thegear shift actuator 150 also has mechanical means for bringing about a translational movement of theshuttle 155, in particular means for transforming a rotational movement into a translational movement. - Here, the reduction gearset assembly has a
pinion 135 on the axis of theworm screw 132, anintermediate pinion 135 and apinion 135 on the axis Xm of themotor 140. The teeth of thepinion 135 may be straight, as illustrated, or helical, in a variant which is not illustrated. - As shown in
FIG. 3 a , the gears are shifted by a slidingshuttle 155 underneath thefree pinions 30 of the gearbox. - The
gear shift actuator 150 axially displaces the shuttle along aworm screw 132 via a helical kinematic connection. - The
shuttle 155 therefore stops underneath the input pinion Fr, that corresponds to the selected gear i. A spring/ball system as described in the French patent application FR2975367 A1 (illustrated here in more detail inFIG. 5 ) prevents the rotation of said input pinion Fri. Once it is triggered, the input pinion Fri meshes with and transmits forces to the output pinion Fi, and thus to the chain sprocket linked to the bicycle wheel. - The rotational guidance of the
worm screw 132 is ensured using bearings at each of its ends, for example.FIG. 3 a illustrates in particular a needle bushing on the side of thepinions 135 of thereduction gear 130 and a ball bearing at the other end of theworm screw 132. -
FIGS. 3 b and 3 c show detail views of the gear shift device ofFIG. 3 a. - Whereas the
shuttle 155 is illustrated inFIG. 3 a in the position P7 corresponding to a gear No. 7, here the top gear, and engages the input pinion Fr7 such that it meshes with the output pinion F7, inFIG. 3 b theshuttle 155 is in the position P1 corresponding to a gear No. 1 and engages the input pinion Fr1 by virtue of a ball/spring device. The shuttle houses a return member 152 that cooperates with a ball 151 of theselection shaft 200. - The
shuttle 155 is moreover connected to arail 134 by anut 138. - If the
machine 900 rolls in a gear i, without it being shifted, theworm screw 132 does not turn. As shown inFIG. 3 c , theshuttle 155 surrounding thenut 138 can turn by virtue of thebearing 136, retained by a clip 137 here. - In the event of a gear-ratio shift, the
worm screw 132 is rotated by thegear shift actuator 150. Theworm screw 132 is rotated by thegear shift actuator 150, this causing the axial movement of thenut 138 which drives theshuttle 155 and thus changes the gear. The pivot connection thus implemented transforms the rotational movement of theworm screw 132 into the translational movement of theshuttle 155. Astop 133 limits the displacement of theshuttle 155 at each end. Thestops 133 are for example hollow, as illustrated, and accommodatebearings 136 that serve to support and guide theworm screw 132. - In a variant which is not shown, the
shuttle 155 may adopt a position referred to as the neutral position P0 in which no gear ratio is engaged. - In the example of the gear shift device described above, the
gear shift actuator 150 has straight pinions. In the context of the invention, the reduction gearset may have helical pinions. -
FIG. 4 illustrates thecasing 600 for themobility machine 900 ofFIG. 1 in more detail. - The
casing 600 has acrankcase 660 that delimits a first housing 610 arranged so as to accommodate the gearings of thegear shift device 100. Thecrankcase 660 also delimits multiple second housings that are separate from one another. Thehousings electric motor 400, thereduction gear 300, thegear shift actuator 150 and the control unit 800 of the mobility machine, respectively. The second housings are preferably sealed, in particular that one which is arranged so as to contain the control unit 800. - The
crankcase 660 accommodating thegear shift device 100 is closed by twolateral flanges 667. Thecasing 600 is illustrated empty and with just oneflange 667 inFIG. 4 in order to make the various first and second housings more visible. The first housing 610 has two facing holes in thelateral flanges 667 for receiving the axle of crankset spindle of themobility machine 900. -
FIGS. 5 and 6 relate to the second embodiment. Thegear shift device 100 has anepicyclic gear train 130′ having aninner ring 30 int that is integral with theselection shaft 200 and anouter ring 30 ext that is integral with theworm screw 132. Theinner ring 30 int and theouter ring 30 ext are linked by three satellite pinions 135. - In the steady state of rolling, the
worm screw 132, theselection shaft 200 and theshuttle 155 turn at the same speed. In order to shift gears, thereduction gearset 140 temporarily turns the outer ring through a determined angle that depends on the necessary displacement of theshuttle 155 between the positions that respectively correspond to the initial gear and to the desired gear. Following the angular deflection thus created between theinner ring 30 int and theouter ring 30 ext, the ratio between the rotation of each ring is temporarily no longer equal to one. Theshuttle 155 is thus driven in a translational movement until it reaches a new position corresponding to the new gear that is selected. - The first embodiment with a rail and nut is not limited to one type of reduction gearset having pinions with parallel axes, as illustrated in
FIG. 3 a . The axes of the pinions of the reduction gearset may be perpendicular. - Whereas in the illustrated variants of the first embodiment, in particular the example illustrated in
FIG. 3 a , the reduction gearset hasmultiple pinions 135,FIG. 7 a corresponds to an example in which thereduction gearset 130 is limited to a single pinion. -
FIG. 7 b illustrates a variant in which thegear shift actuator 150 has aconical gearing 130 b. -
FIG. 7 c illustrates a variant in which thegear shift actuator 150 has a straight-cut orhelical gearing 130 c with one or more stages. -
FIG. 7 d illustrates a variant in which thegear shift actuator 150 has a continuously variable straight-cut orhelical gearing 130 d. -
FIG. 7 e illustrates aworm screw 130 e of a variant of thegear shift actuator 150. -
FIGS. 7 f and 7 g show variants having agear shift actuator 150 with abelt 130 f and achain 130 g, respectively. - Similarly,
FIGS. 8 a to 8 g schematically show different variants of a gear shift actuator according to the second embodiment of the invention. -
FIG. 8 a corresponds to the example illustrated inFIG. 5 a with theepicyclic gear train 130′. -
FIG. 8 b illustrates a variant in which thegear shift actuator 150 b has anepicyclic gear train 130′ and a conical gearing. -
FIG. 8 c illustrates a variant in which thegear shift actuator 150 c has anepicyclic gear train 130′ and a straight-cut or helical gearing with one or more stages.FIG. 8 d illustrates a variant in which thegear shift actuator 150 d has anepicyclic gear train 130′ and a continuously variable straight-cut or helical gearing.FIG. 8 e illustrates a variant in which thegear shift actuator 150 e has anepicyclic gear train 130′ and a worm.FIGS. 8 f and 8 g show variants having agear shift actuator 150 f with anepicyclic gear train 130′ and a belt, and agear shift actuator 150 g with anepicyclic gear train 130′ and a chain, respectively.
Claims (20)
1. Gear shift device for a mobility machine, said device having a plurality of k gears between a first gear referred to as gear No. 1 and a top gear referred to as gear k,
said gear shift device having
a series of k input pinions arranged so as to turn freely around a selection shaft with an axis X2, said selection shaft accommodating a worm screw and a shuttle
a series of k output pinions with an axis X3 that rotate conjointly with a hollow shaft
a gear shift actuator arranged so as to displace the shuttle along the worm screw between a plurality of k positions and to engage a selected gear.
2. Gear shift device according to claim 1 , the shuttle being arranged so as, in each position corresponding to a gear, to engage an input pinion such that it meshes with the output pinion, the input pinion and output pinion being associated with said gear.
3. Gear shift device according to claim 1 , the shuttle being arranged so as to accommodate at least one return member.
4. Gear shift device according to claim 1 , such that the shuttle surrounds the worm screw.
5. Gear shift device according to claim 1 , having a pivot connection.
6. Gear shift device according to claim 1 , such that the gear shift actuator has a motor,
and a reduction gear or an epicyclic gear train.
7. Gear shift device according to claim 1 , such that the gear shift actuator is arranged so as to displace the shuttle between the predefined positions following a gear selection request from a rider of the mobility machine and/or from a control unit of the mobility machine.
8. Gear shift device according to claim 1 , such that the shuttle can adopt a position referred to as the neutral position in which no gear ratio is engaged.
9. Gear shift device according to claim 1 , having a rail along which the shuttle is displaced, said rail being located in particular in the selection shaft.
10. Gear shift device according to claim 1 , having an epicyclic gear train with an inner ring and an outer ring.
11. Mobility machine, in particular an electrically assisted mobility machine, having a gear shift device according to claim 1 .
12. Gear shift device according to claim 2 , the shuttle being arranged so as to accommodate at least one return member.
13. Gear shift device according to claim 2 , such that the shuttle surrounds the worm screw.
14. Gear shift device according to claim 2 , having a pivot connection.
15. Gear shift device according to claim 2 , such that the gear shift actuator has a motor,
and a reduction gear or an epicyclic gear train.
16. Gear shift device according to claim 2 , such that the gear shift actuator is arranged so as to displace the shuttle between the predefined positions following a gear selection request from a rider of the mobility machine and/or from a control unit of the mobility machine.
17. Gear shift device according to claim 2 , such that the shuttle can adopt a position referred to as the neutral position in which no gear ratio is engaged.
18. Gear shift device according to claim 2 , having a rail along which the shuttle is displaced, said rail being located in particular in the selection shaft.
19. Gear shift device according to claim 2 , having an epicyclic gear train with an inner ring and an outer ring.
20. Mobility machine, in particular an electrically assisted mobility machine, having a gear shift device according to claim 2 .
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2012292 | 2020-11-27 | ||
FR2012292A FR3116794A1 (en) | 2020-11-27 | 2020-11-27 | Speed change device and associated mobility device. |
FR2013339A FR3116795B1 (en) | 2020-11-27 | 2020-12-16 | Speed change device and associated mobility device. |
FR2013339 | 2020-12-16 | ||
PCT/EP2021/083182 WO2022112506A1 (en) | 2020-11-27 | 2021-11-26 | Gear shift device and associated mobility vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
US20240043090A1 true US20240043090A1 (en) | 2024-02-08 |
Family
ID=78821644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/254,470 Pending US20240043090A1 (en) | 2020-11-27 | 2021-11-26 | Gear shift device and associated mobility machine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20240043090A1 (en) |
EP (1) | EP4251507A1 (en) |
JP (1) | JP2023551489A (en) |
CA (1) | CA3200380A1 (en) |
TW (1) | TW202227321A (en) |
WO (1) | WO2022112506A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20230012006A1 (en) * | 2021-07-12 | 2023-01-12 | The Hive Global, Inc. | Seal for bicycle crank with differential chainring motion |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2659408B1 (en) * | 1990-03-06 | 1992-05-29 | Renault | DEVICE FOR CONTROLLING A MECHANICAL GEARBOX. |
FR2805587B1 (en) * | 2000-02-28 | 2002-05-17 | Valeo | AUTOMATED GEAR TRANSMISSION DEVICE, PARTICULARLY FOR A MOTOR VEHICLE |
FR2975367B1 (en) | 2011-05-18 | 2013-06-21 | Guy Cavalerie | DEVICE FOR CHANGING SPEEDS FOR BICYCLES |
CN208870981U (en) * | 2018-06-13 | 2019-05-17 | 陕西理工大学 | A kind of automatic transmission of servo direct driving shift |
-
2021
- 2021-11-26 WO PCT/EP2021/083182 patent/WO2022112506A1/en active Application Filing
- 2021-11-26 JP JP2023532422A patent/JP2023551489A/en active Pending
- 2021-11-26 US US18/254,470 patent/US20240043090A1/en active Pending
- 2021-11-26 TW TW110144249A patent/TW202227321A/en unknown
- 2021-11-26 CA CA3200380A patent/CA3200380A1/en active Pending
- 2021-11-26 EP EP21819459.5A patent/EP4251507A1/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20230012006A1 (en) * | 2021-07-12 | 2023-01-12 | The Hive Global, Inc. | Seal for bicycle crank with differential chainring motion |
Also Published As
Publication number | Publication date |
---|---|
TW202227321A (en) | 2022-07-16 |
WO2022112506A1 (en) | 2022-06-02 |
EP4251507A1 (en) | 2023-10-04 |
CA3200380A1 (en) | 2022-06-02 |
JP2023551489A (en) | 2023-12-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4056130B2 (en) | Driving assistance device in a battery-assisted bicycle | |
US9381974B2 (en) | Electric derailleur motor unit and motorized derailleur | |
CN1930757B (en) | In-line actuator apparatus and method | |
US20240043090A1 (en) | Gear shift device and associated mobility machine | |
CN101258066A (en) | Steering device and movement converting device used therefor | |
US20190368579A1 (en) | Transmission device for gear switching, and human-powered vehicle comprising said device | |
CN112407135A (en) | Mid-motor capable of multi-gear variable speed adjustment | |
GB2580446A (en) | Electrically-assisted pedal cycles | |
US11383789B2 (en) | Variable speed drive, a drive device for an assisted-pedal human-powered vehicle and a vehicle comprising said device | |
CA3145016A1 (en) | Multi-speed bevel-planetary hub transmission | |
CN111788114A (en) | Bicycle speed changing device using variable speed motor and planetary gear mechanism | |
CN210566145U (en) | Transfer case for smart city maintenance vehicle | |
CN116710355A (en) | Gear shifting device and associated mobile vehicle | |
FR2988796A1 (en) | Mechanical torque and speed variator for bicycle, has conical roller stages driving coaxial driveshaft by pressure at output of casing according to torque modified by differential number of revolutions of driving shaft | |
US6988973B2 (en) | Transmission device for introducing a shift movement into a bicycle internal gear hub | |
JP2024511406A (en) | Transmissions and related mobility vehicles | |
JP2015105012A (en) | Drive device of electric vehicle | |
JP4040653B2 (en) | Crank device, vehicle crank pedal device including the same, and vehicle including them | |
CN110843996B (en) | Gearbox suitable for bicycle | |
US715404A (en) | Variable-speed gear for vehicles. | |
CN110843995B (en) | Shift assembly for bicycle | |
US479470A (en) | Bicycle | |
FR3116795A1 (en) | Speed change device and associated mobility device. | |
WO2023144225A1 (en) | Gearbox, powertrain for a vehicle comprising said gearbox and vehicle comprising said gearbox | |
US20170036737A1 (en) | Velocipede gearbox with two or more transmission ratios |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
AS | Assignment |
Owner name: VALEO EMBRAYAGES, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CAILLAUD, JONATHAN;SIEGWART, JEAN BAPTISTE;DORET, QUENTIN;AND OTHERS;SIGNING DATES FROM 20230620 TO 20230718;REEL/FRAME:065639/0874 |